Process of making dipolymer



I 'l 'o Drawing.

Biased ev. .13, 1928..

I g 4 mm) 's'rATEs IBvnr w. nuurnnnr, or wnan'ron, nnw' .mnsnr, assrenon r0 nnncnnns rownnn.

PATENT. canola..-

comm, orwmmme'ron, nnnawann, A conronarron or nnnawann.

' 1 rnocnss or Manned nrronmnn.

ipolymer,a's the term is herein employed,

' is a product, consisting of polymerized terwood. Pure v pine oil, byan entirely ing distinct advantages.

. converted into Dipolymer pene hydrocarbons' which merizing 'dipentene, turpentine, or pine oil. .Although it is largely composed of the Dipolymer' (6 11 substantial proportions of higher polymers, (C; H ,'are generally present. Dipentene, as the term is herein employed, refers to the cut of pine productsboiling largely. between 165 and 185 C., which is obtained in the steam distillation of pine dipentene boils at l74 6 CI, butthe term dipentene as herein used is intended to comprehend the crude product with the wider boiling ran e. y It is known to make ipolymer in the liquid phase by treating turpentine or 'dipentene I have discovered that either a liquid phase or vapor phase, from new process present- I have discovered that'pine oil is largel by refluxing it wit a metallic chloride. The heating all during the heatin part of the light'oiL- hereaction is:

In a typical exampldlOOO cc. of pine oil were refluxed-with 30 for three hours,

v the water being allowed to distill'ofi. 620

cc. of Dipolymer were obtai'ned. A portion of the-light oil Was*p0ly-.

40 Because water is t1a .l polymerization.

- metallic chloride,

merized on retreating with s'tannic chloride.

considerable amounttof para-cymene is formed, which is not olymerized.

iiist split on from the pine oil, it was expected that the water would destroy the activity of the metallic chloride 5 and prevent polymerization. Contrary.to exportion of the unpassing through the tube.

is obtained by polysome instances without refi with sulfuric acid of various concentrations. it maybe prepared, in

ance of a dark colored rosin.

may be so will distill period, along with a i chlorides are preferable if a.' quite active metallic chloride, such as gms. of stannic chloride "1926, Serial lat temperatures enough to cause parhydr Application filed July 20,1926. Serial No. 123,8;8.

polymerized oil may be polymerized by ree crude product whichis polymerizing pine oil may be employed, in ning; ,but it is usually preferable to distill off the lower boilireig end, cutting around 250- C. By this proc ure, thehy rocarbons and any unaltered pine oil are separated, leaving a residue consisting of crude Dipolymer.

A typical sample of crude Dipolymer has a specific gravity of 0.95, and the following bgiling range: 5% over at 30 (3., 20% at 3 6 90% at 375 C. Ifa cut is made w proximately80% has-distilled over, a product is obtained be made'comprisin obtained on 0., at 335 0., 70% at 342 (land en ap having a specific'gravit of 0.94. 'A second cut may y approximately the 95% portion of the' crude Dipolymer. This cut is exceedingly viscous and resembles a soft rosin. The residue is hard and brittle'and has the appear- For some apphcations of the Dipolymer it may be desirablev to separate it into cuts as outlined above.

It is believed that any of the metallic chlorides... are workable. place of stannic chloride, there may ployed any of the chlorides ofaluminum, iron, zincandantimony. Anhydrousmetallic tothe hydrated, but stannic' chloride, is'employed, the hydrated form" may be practically as efficient, if not preferable. -A mixture of metallic chlorides may {be employed. In

be desirable to.utilize 'a metallic chloride asa certain cases, it may 80 .For example, in-

e emconstituent of a catalytic mixture, as, for,

example, fullers earth, or

I have not herein claimedthe u se 6r fullers earth or other silicious or ar as a catalyst, as such forms t other silicious'or :argillaceous earth, impregnated with the me--. tallic'chloride.

aceous earth subject mat-' ter of an ap'p cation filed by'meon. July 29, 5'

No. 123,812. now fully described my Patent is: i

'1'." The-process of from :pine oil, which includestreating." me oil HSNHIF imn'ention, .whatI c aim and desire-toprotect by preparin 'fDipeiymer V V with a metallic chloride and heat'toe ect de-- l the. formation of ation ofcompon'ents ofthe ping-oil 2: e es ed eme;

. I 1 i k w the treatment for a time sliflicient toefiect. components of the pine-oil and continuing conversion of. substantial proportion therethe treatment to efieotconversion ot a sub of and ofthe dipenteneinto di and higher stantial proportion of the conversion prod-- polymers.

5 2. The processof preparing Dipoljiner polymers.

- from pine oil, which includes treating pm In testimony of iirhich invention here oil with a metallic chloride and heEt for the hereunto set my hand, at Philadelphia, Penn- 'production of eonversion products and 'disylmnimon this Qndda. fJu1y,1926;

w penteneby splitting ofi water from certain IRVIN- iicts and of the dipentene into di and higher 

